20285492 has 6 divisors (see below), whose sum is σ = 35499618. Its totient is φ = 10142744.

The previous prime is 20285477. The next prime is 20285497. The reversal of 20285492 is 29458202.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 1240996 = 4364^2 + 1114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2535683 + ... + 2535690.

It is an arithmetic number, because the mean of its divisors is an integer number (5916603).

Almost surely, 2^20285492 is an apocalyptic number.

It is an amenable number.

20285492 is a deficient number, since it is larger than the sum of its proper divisors (15214126).

20285492 is a wasteful number, since it uses less digits than its factorization.

20285492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071377 (or 5071375 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20285492 is about 4503.9418291093. The cubic root of 20285492 is about 272.7272385589.

The spelling of 20285492 in words is "twenty million, two hundred eighty-five thousand, four hundred ninety-two".